This is, quite to my surprise, a fabulous book. I say "to my surprise" because the fact is, as others have noted, for much of the book nothing actually happens. And I am, as my GR friends know, a terribly impatient reader (that is a confession, not a boast) - of fiction. And yet...
This book, perhaps the entire series, will not appeal to everyone. It is understated, intellectual, absolutely devoid of flash and hype -- it is not that it is "sparse"..., which carries connotations when writing about Swedish mystery writers; it is just unembellished. Beck is an interesting and original character and is also himself unembellished.
The writing (and the writers) are too intelligent to be boring.
(I downgraded my rating of Roseanna to 4-stars because I liked this one better).